[Bug 86095] New: [ILK]igt/kms_mmio_vs_cs_flip/setplane_vs_cs_flip sporadically causes system

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86095

            Bug ID: 86095
           Summary: [ILK]igt/kms_mmio_vs_cs_flip/setplane_vs_cs_flip
                    sporadically causes system
           Product: DRI
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: huax.lu at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 109194
  --> https://bugs.freedesktop.org/attachment.cgi?id=109194&action=edit
dmesg

==System Environment==
--------------------------
Regression: not sure 
Non-working platforms: ILK

==kernel==
--------------------------
drm-intel-fixes/dc54e76d12f2b9ee32f8f4bc7ade79dbc7e6e55c

==Bug detailed description==
It causes system hang on ILK with -fixes kernel, it happens 3 in 5 runs. 


output:
IGT-Version: 1.8-gc049c39 (x86_64) (Linux:
3.18.0-rc3_drm-intel-fixes_dc54e7_20141110+ x86_64)

==Reproduce steps==
---------------------------- 
1. ./kms_mmio_vs_cs_flip --run-subtest setplane_vs_cs_flip

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